11011011012121 has 4 divisors (see below), whose sum is σ = 11218765936932. Its totient is φ = 10803256087312.

The previous prime is 11011011012119. The next prime is 11011011012139. The reversal of 11011011012121 is 12121011011011.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 6769306000521 + 4241705011600 = 2601789^2 + 2059540^2 .

It is a cyclic number.

It is not a de Polignac number, because 11011011012121 - 2¹ = 11011011012119 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11011011012151) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 103877462326 + ... + 103877462431.

It is an arithmetic number, because the mean of its divisors is an integer number (2804691484233).

Almost surely, 2^{11011011012121} is an apocalyptic number.

It is an amenable number.

11011011012121 is a deficient number, since it is larger than the sum of its proper divisors (207754924811).

11011011012121 is an equidigital number, since it uses as much as digits as its factorization.

11011011012121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 207754924810.

The product of its (nonzero) digits is 4, while the sum is 13.

Adding to 11011011012121 its reverse (12121011011011), we get a palindrome (23132022023132).

The spelling of 11011011012121 in words is "eleven trillion, eleven billion, eleven million, twelve thousand, one hundred twenty-one".